Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdda26c98892c01…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 03:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e7db62e6e4ff034d5b7fc105015287a SHA-1: 9743a76fb08f84a4337e7fee72ee060d9276afdd SHA-256: 2fdda26c98892c01735ed0e87d96c2fd47025bbafbd476ab1feb0e174fe8467d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=libros+de+microbiologia+clinica+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The primary malicious IOC is the redirector URL.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=libros+de+microbiologia+clinica+pdf
    • http://files.qthpublishing.com/uploads/1/3/1/3/131381946/4d7c5.pdf
    • http://files.northwoodsares94.com/uploads/1/3/1/3/131379639/5224814.pdf
    • http://files.monicasayers.com/uploads/1/3/0/8/130814475/16eceaf4c20.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/46748844319.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/vozakipudisokan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/77441274463.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/67565146988.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/sokix.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/english_grammar_past_tense.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/aptis_writing.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/38904369784.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/rafugegazitawixamivevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3496/files/51479922745.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/wutow.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/tokawigixon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d31.bin
119799e3c7d6d6f8471bd87a306347be47a49f4b36b9041e9ef567d01c14d9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5556 bytes
font_01_sfnt_off00007000.bin
8400959e4725a774e435119df2e81232faff97c8910a0ad7e32cf7219e8f64de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 11612 bytes

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